ARM: dts: am335x-wega: Fix typo in mcasp property rx-num-evt

Fix the property name 'rx-num-evt'.
Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am335x-wega.dtsi

@@ -55,7 +55,7 @@ &mcasp0 {
 		2 1 0 0 /* # 0: INACTIVE, 1: TX, 2: RX */
 	>;
 	tx-num-evt = <16>;
-	rt-num-evt = <16>;
+	rx-num-evt = <16>;
 	status = "okay";
 };